<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>websocket测试</title>
</head>

<body>
<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket = new WebSocket("ws://localhost:8899/ws");

        socket.onmessage = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value+"\n"+event.data;
        }

        socket.onopen = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = "连接开启";
        }

        socket.onclose = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value+"\n"+"连接关闭";
        }
    }else{
        alert("浏览器不支持websocket")
    }

    function send(message){
        if(!window.WebSocket){
        return;
        }
        if(socket.readyState == WebSocket.OPEN){
            socket.send(message);
        }else{
        alter("连接尚未开启")
        }
    }
</script>

    <form onsubmit="return false;">
        <textarea name="message" style="width: 400px;height: 200px"></textarea>
        <input type="button" value="发送数据" onclick="send(this.form.message.value)">
        <h3>服务器输出：</h3>
        <textarea id="responseText" style="width: 400px;height: 200px"></textarea>

        <input type="button" value="清空内容" onclick="javascript:document.getElementById('responseText').value=''">
    </form>
</body>
</html>